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(No Model.) I

S. J. SHIMER.

GUTTER HEAD AND CUTTER HEAD GAGE. No. 380,530. Patented Apr. 3,1888.

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UNITED STATES PATENT Price.

SAMUEL J. SHIMEB, OF MILTON, PENNSYLVANIA, ASSIGNOR TO SAMUEL J. SHIMER 85 SONS, OF SAME PLACE.

CUTTER-HEAD AND CU-TTER HEAD GAGE.

SPECIFICATION forming part of Letters Patent No. 380,530, dated April 3, 1888.

Application filed December 9, 1887. Serial No. 257,455. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL J. SHIMER, a citizen of the United States of America, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented a new and useful Gage for Gutter-Heads, of which the following is a specification.

My invention relates to improvements in means for determining the adjustment of the bits or cutters of a cutter-head in either a lat eral or vertical direction; and it consists in forming the cutter-head with angular grooves in the top and bottom faces, said grooves being arranged at an angle on the line with the beveled faces of the eutters,and in agagehaving graduated blade-lines to determine the adjustments by, and formed with projecting guides to slide in the grooves of the cutterhead.

I have fully illustrated my invention in the accompanying drawings, forming a part here of, whereby- Figurel represents a side view of a dado cutter-head having a bit secured therein and my improved gage applied to adjust the cut of the bit. Fig. 2 is an end or plan view of the cutter-head,showing the arrangement of the gagegrooves and the gage applied. Fig. 3 is a perspective of my improved gage. Fig. 4 is a reverse view, and Fig. 5 an end view thereof.

Like parts appearing in the different figures of the drawings are designated by the same notations of reference.

A designates the cutter-head, having fixed and adjusted therein in operative position the bits or cutters B. The cutter-head shown in the drawings is of that character known in the trade as a' dado head, having the top and bottom faces arranged on parallel planes and provided with verticallyarranged slots in the sides of the head, in which are fitted the means for clamping and holding the bits or cutters, substantially as shown.

It will be observed that my improvements are applicable to any cutter-head having parallel top and bottom faces and provided with bits horizontally movable or vertically adjustable, and therefore it is not deemed essential to a proper understanding of my improvements that amore specific description of the general features of the cutter-head be here given. In the top and bottom faces of the cutter-head are formed open-end slots or angular grooves 1, entering the body of the head just in front of the chip-recess of each bit and arranged in the same relative direction as the bevel-line of the blade of the bit or cutter,and so that when the gage is set in position the face of the graduated portion of the gage shall setagainst the beveled surface of the bit, as shown in Figs. 1 and 2 of the drawings.

B designates my improved gage, substantially ofthe form shown in the drawings, and consisting of a metal plate having a central piece, 2, on the face of which is indicated a scale of linear measurements, 3, and also parallel lines 4, arranged at right angles to the linear measurements. The former serve to measure the vertical adjustments of the respective bits and the latter serve-to determine theprojections of the bits in a horizontal direction. The ends of the central piece, 2, are extended at a plane about on a line with the under surface of the graduated part, as at 5, and the extensions may be formed with ribs 6, to strengthen them and to afford a more convenient and ready hold for the hand. The parts5 are also lengthened, as at 7, forming projections, lugs, or guide-pieces to slide and fit within the grooves 1 when the gage is applied. This construction, it will be seen, admits of the gage being cut out in the under side, as at 8, so as to raise the measuring-face up to the bit and bring the under surface clear of the heel of the bit; but to avoid all interference with the heel of the bit the inner edge of the parts is beveled, as at 9. The graduated plate of the gage and its projecting lugs or guide-pieces 7 are arranged on lines parallel with the same plane, so that the direction of the graduated part shall coincide with the direction of the guides when the gage is applied.

The gage is applied by sliding the guidepieces 7 in the guide-slots 1 of the cuttenhead until the gage is seated. The face of the gage will then set against the point of the bit,which may be adj usted by the gradnations on the gage in any desired direction and then clamped.

A repetition of the same act in respect to the remaining bits will effect an adjustment to, a common cut in all.

What I claim is- 1. In combination with a cutter-head formed with guide-slots in the parallel top and bottom faces and a cutting-bit secured to the cut ter-head, a gage comprised of a metal plate formed with a central piece havinggraduations of measurements thereon, and formed with its ends extended and arranged below the upper face of the central piece, and guide-extensions arranged to register with and set with-in the guide-slots in the head, substantially as described. p

2. A cutter head formed with open-end gage-slots in the parallel top and bottom faces,

arranged in the direction of the line of the bevel of the cutting-bit for the reception of gage supporting lugs, substantially as de- 20 scribed.

3. The cutter-head gage herein described, consisting of the metal plate B, havingagraduated central portion, 2, the end-extensions,5, arranged on a different plane parallel to the 25 central portion, and the guide-pieces 7, to slide in open-end slots in the cutter-head, substantially as described, and for the purposes stated.

In testimony whereof I have hereunto set my hand in presence of two attesting Witnesses.

SAMUEL J. SHIMER. Attest:

JOHN A. BEcK, H. K., WHITMAN. 

